Billy is One's Boyfriend. He helped the Seven Little Monsters in a baseball game and One introduced him to her brothers, Six, Henry and Mary as well as her mother.
| Billy | |
|---|---|
 | |
|
Born |
Unknown |
|
Sex |
Male |
|
Species |
Human |
|
Friends |
Seven Little Monsters, Mary and Henry |
|
Siblings |
None |
|
First Appearance |
|
|
Age: |
9 |
|
Girlfriend |
|